Abstract: Disclosed, inter alia, is a Physical Layer Transceiver (PHY) with integrated time synchronization, such as, but not limited to, IEEE 1588 Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems. The PHY includes circuitry to maintain a current time, and to trigger the storage of timestamps corresponding to received frames. Typically, in response to a request from an external device, the timestamps are retrieved from storage and are communicated to the external device. By moving the triggering of the storage of the timestamps by the PHY itself, rather than by a monitoring of the traffic between the PHY and the Media Access Controller (MAC), higher accuracy can typically be achieved.

Abstract: Disclosed, inter alia, is a Physical Layer Transceiver (PHY) with integrated time synchronization, such as, but not limited to, IEEE 1588 Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems. The PHY includes circuitry to maintain a current time, and to trigger the storage of timestamps corresponding to received frames. Typically, in response to a request from an external device, the timestamps are retrieved from storage and are communicated to the external device.

Abstract: Disclosed are, inter alia, methods, apparatus, data structures, computer-readable media, mechanisms, and means for maintaining consistency among timestamp counters distributed among multiple devices. When timestamp counters are distributed among multiple physical devices, variances in their timestamp values can occur, such as, but not limited to those cause by variances among clocks in these different devices, different routing delays, different components, etc. These differences may be same, but still not allow high enough precision, especially as packet and processing rates continue to increase (which also causes clocking rates of devices to increase). One implementation distributes a time advance signal to each of these devices, which each device independently uses to determine when to advance its timestamp counter in response to its clock signal.

Abstract: Disclosed are, inter alia, methods, apparatus, data structures, computer-readable media, mechanisms, and means for maintaining consistency among timestamp counters distributed among multiple devices. When timestamp counters are distributed among multiple physical devices, variances in their timestamp values can occur, such as, but not limited to those cause by variances among clocks in these different devices, different routing delays, different components, etc. These differences may be same, but still not allow high enough precision, especially as packet and processing rates continue to increase (which also causes clocking rates of devices to increase). One implementation distributes a time advance signal to each of these devices, which each device independently uses to determine when to advance its timestamp counter in response to its clock signal.

Abstract: An apparatus and method for selecting and recording multi-directional communication packet traffic in a compact manner in realtime while maintaining relative time between the selected packets passing in one direction and the selected packets passing in another direction. The apparatus includes a protocol interface, a block datapath, a record resource, and a trace merge memory. The protocol interface receives X and Y channel packets with interspersed idle times, segments the packets into time-aligned X and Y blocks, and eliminates idle times. The block datapath merges the X and Y blocks, then filters unneeded X and Y channel packets by purging the X and Y blocks from those packets. The record resource compares patterns for identifying the unneeded packets and trigger events. The trace merge memory records the time-aligned filtered merged block stream in a compact form for later analysis.